Tiffany & Co Onyx and Diamond Earrings
Tiffany & Co, pair of 18ct gold, platinum, diamond and onyx earrings, 1985, each earring centring a round onyx cut en cabochon, within a border of twelve round brilliant-cut diamonds together weighing approximately 0.28 carats, spaced by gold 'X' motifs, signed Tiffany & Co 1985, to post and clip fittings, diameter 0.71 in.
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- Onyx - Onyx is a form of agate, used from antiquity and popular again in the 1920s and 30s. European onyx is generally green, but can be many other colours, and can contain bands of black and/or white.
This multicoloured stone is widely used for table tops, lamp bases and in jewellery. Some types of onyx are also used for cameos of which the upper white layer is cut away to reveal the colour beneath. - Cabochon Cut in Jewellery - A cabochon cut is a type of gemstone cutting where the stone is cut and polished in a convex shape with a flat bottom and a domed top, with no facets. This type of cut is typically used for opaque or translucent stones that have natural patterns or inclusions that are best displayed in this type of cut. Examples of stones that are often cut as cabochons include turquoise, opal, and moonstone.
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